I don't know about now, but back in the old days when I was in school, I did not have a student ID card when I was in 11th grade that I could carry with me. College ID yes, but not a high school ID (as a 17 year old).
Same here, but I'd guess in today's ultra-security-conscious world, that ID cards for high school students are more of a "thing." Of course, considering both the age range and the promotional copy, this is clearly aimed at college students. Nothing in the T&C limits it to college students, though.
Parents are overly worried about every little thing they fear "might" happen. They expect school buses to drop their kids off at their front doors. Their children rarely walk anywhere or take public transportation, and then we lament the obesity crisis. They don't let kids go out and play; they schedule "play dates" with other kids through
their parents. In a generation, will we be implanting electronic chips in kids like we do in dogs? Let kids be kids. Let them learn through trial and error. Yes, there will be the rare tragedy, but we see them happening anyway and always have. Rant over.
To keep this on topic -- it doesn't surprise me that high schoolers or younger have ID cards today, so if Amtrak is offering discounts for all kids except 13-16 year olds, the possession of a student ID should allow them to get a discount, too. It wouldn't hurt the Amtrak bottom line that much, and might even attract new business.